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CNG stands for Compressed Natural Gas. It is a gaseous fuel and is a mixture of hydrocarbons - mainly Methane. For use in Automobiles as fuel, it is compressed to a pressure of 200-250 Kg/cm2 to enhance the vehicle’s onboard storage capacity.
Is CNG safe?
Yes, it is safe. The properties of CNG make it a safe fuel. It is lighter than air, so in case of a leak it just rises up and disperses into the atmosphere. Besides, a high auto-ignition temperature of 540°C as against petrol’s 360°C makes it a safe fuel. Also, in case of a leak, if CNG’s concentration in the air is less than 5% and more than 15%, the gas will not burn even in the presence of a spark
What is involved in converting a vehicle to a CNG - friendly one?
All spark-ignited engines can be converted to CNG, but a specially designed conversion kit is required for the purpose. The kit consists of a cylinder to be fixed in the boot of the car and other equipment to allow gas flow into the engine. Of late, research is on for converting diesel-run vehicles to dual-fuel with CNG.
Can a car, fitted with CNG conversion kit, run on Petrol after its CNG gets over?
Yes, after conversion to CNG the vehicle can run on petrol whenever desired simply by flicking a switch on the dashboard. These are called dual-fuel vehicles.
What is the cost of converting a vehicle to a CNG-friendly one?
The cost of converting a vehicle to CNG depends on its type and make, and may range anywhere from ` 26,000.00 to around ` 50,000.00
What are the dimensions and weight of a CNG cylinder?
CNG cylinders are manufactured from a special steel alloy and are seamless in construction. Their compact size allows them to easily fit even in a small car. An empty CNG cylinder with a 50 water liter carrying capacity (WLC) weighs 48 kg, with a length of 835 mm and a diameter of 316 mm, and can store approximately 8 to 9 Kgs of CNG – depending upon filling conditions, gas density, etc. The 50 WLC capacity cylinder is the one most regularly used – with cylinders of 45 WLC, 55 WLC, 60 WLC and 65 WLC capacity are used as well
What is the mileage from one fill? How does one get to know the quantity of CNG left in the cylinder?
The mileage depends upon city road conditions and may vary from vehicle to vehicle and driving habits. A cylinder with a 50-liter water-carrying capacity is capable of carrying approximately 9 kg of CNG. This is equivalent to 12.5 liters of petrol and will allow a run of about 150-160 km for a medium sized 1300 CC car. Also, many OEM manufactured and retrofitted cars have electronic fuel gauge indicators fitted on the dashboard that give an approximate idea about CNG remaining in cylinders.
What is the pressure of CNG in a cylinder? Is refueling of a cylinder safe, given the pressure?
CNG cylinders are designed and built in such a way so as to withstand high pressure. The maximum pressure in a CNG cylinder is up to 200 kg/cm2 (g) (about 2840 psi[g]). CNG cylinders are safe as they are manufactured as per specific requirements and tested before use, in accordance with international specifications and standards and they are duly approved by Chief Controller of Explosives. Moreover, these have been provided with a ‘safety burst disc’ such that in case of inadvertent high-pressure/high temperature at the time of filling or at any other time, this disc is ruptured and pressure released. Further, these cylinders are to be re-tested every three years at CNG Cylinder Retesting Cylinders approved by Petroleum and Explosives Safety Organisation (PESO).
How much will be the saving after conversion to CNG?
The fuel bill on the basis of the average running of the vehicle is reduced by approximately 50 percent after conversion of CNG at the present price of CNG & Petrol in Pune. For detailed savings, please refer Savings Calculator.
Does CNG kit require servicing?
CNG kit is safe and simple. It gives years of trouble-free operation. It doesn’t require frequent servicing. Just as for all other fuels, it is advised to have routine services. An authorized person should be consulted for service. As per Gas Cylinder Rules, 1981, the cylinder should undergo hydro-stretch testing every 3 years to check pressure tolerance.
Are factory-fitted/OEM variants of CNG vehicles available?
Yes. All major commercial vehicle manufacturers like TATA, Mahindra, Eicher, SML etc. have CNG variants of their popular models. Also, many passenger car manufacturers like Maruti, TATA, etc. have factory-fitted car models available. Other popular car manufacturers like Hyundai, GM, etc. provide pre-delivery CNG kit retro-fitment of their authorized CNG kits at dealer end.
Does CNG have any harmful effect on the engine?
Owing to CNG’s distinct features, it does not contaminate or dilute crankcase oil, giving a new lease of life to the engine. The absence of any lead content in CNG helps avoid lead fouling of plugs, thereby enhancing plug life. One of the important benefits of CNG is that upon entering the engine in the form of a gas (and not as a spray or mist like other fuels), it doesn’t disturb the presence of lubricating oil in the engine and reduces chances of wear and tear
Can a diesel vehicle be converted to CNG?
Yes, a diesel vehicle can be converted to run on CNG, but the conversion cost is higher than the conversion of petrol vehicles and under the current technology it cannot run on dual fuel mode. However, research in India is in process for allowing diesel-run vehicles to function as dual-fuel on CNG.
Why are exhaust fumes so small in CNG-run vehicles?
CNG is an environment-friendly fuel. The natural gas is mainly composed of methane and its exhaust emissions consist of water vapours and a small fraction of carbon monoxide. The absence of carbon and other particulates result in negligible amount of harmful elements in exhaust fumes.
How does large-scale CNG usage benefit the country?
CNG emits less carbon dioxide and other pollutants as compared to liquid fuels. Thus, CNG contributes in lowering air pollution, also helps in improving the Balance of Payments by acting as a substitute for imported liquid fuels, provides more business and job opportunities with the opening up of a new sector, and being competitively priced, it appeases motorists.
In which countries are natural gas vehicles popular?
Natural gas as a vehicle fuel has a long and established record in Europe, Canada, India, New Zealand, Australia and in USA. Other countries such as Japan, Mexico, Malaysia, Pakistan, and Bangladesh are recognizing the benefits of CNG and plan to expand its use.Can an existing LPG vehicle run on CNG?
Can an existing LPG vehicle run on CNG?
An LPG-fuelled vehicle will not run on CNG as the two fuels are different from each other, have differing calorific values and need different air-fuel ratios for combustion. CNG has to be stored at relatively higher pressure in a cylinder than LPG, so the same cylinder cannot be used for both gases. A vehicle will need specific conversion for CNG operation. For list of RTO authorized CNG retrofitters, please refer here or Regional Transport Office, Pune/Pimpri-Chinchwad.
Which other cities in India have CNG refueling facilities?
Other than Pune and Pimpri-Chinchwad in Maharashtra, CNG is readily available in Mumbai, Thane, Navi-Mumbai, Mira-Bhayander, etc. Other nearby cities are Indore, Surat, Vadodara, Ahmedabad and almost all of Gujarat. CNG is also present in Delhi and around 25 other cities of the country.
Where is the tank placed in the car?
The CNG cylinder is fixed in the luggage space of your car. It is fastened with a metal strap so that it does not move while the car is running. As per BIS code, it has to be a permanently fitted tank and should be integral part of vehicle (as per BIS 14899 for fuel tank container and as per LPG/CNG Control order)
Natural gas offers many advantages over conventional petroleum products. Compressed natural gas (CNG) is the smart and affordable choice for fleet vehicles, stage and contract carriages, waste disposal trucks, delivery vehicles, and more. With CNG, you’ll save money on fuel, reduce emission levels, and extend the life of your vehicle.
Reduced Fuel Cost –
Natural Gas (CNG) represents almost a 50% savings over conventional products such as petrol and diesel fuel. Over the last decade, the average cost per liter of petrol in Maharashtra has risen approximately 10%. In 2004, the average price per liter of petrol in Maharashtra was ` 37.00, today the average price is around ` 76.00. In a very competitive economy, there is no better time to look for alternative ways to fuel our vehicles.
Environmentally Friendly –
Compressed natural gas (CNG) is one of the cleanest burning transportation fuel on the market today. CNG burns cleaner than petroleum based products because of its lower carbon content. CNG produces the fewest emissions of all other fuels and contains significantly less pollutants than conventional liquid fuels. CNG produces 20-30% fewer greenhouse gas emissions and 95% fewer tailpipe emissions than petroleum products. And because CNG fuel systems are completely sealed, CNG vehicles produce no evaporative emissions.
Reduced Maintenance Cost –
CNG does not contain lead, so spark plug life is extended because there is no fouling. CNG does not dilute or contaminate crankcase oil, so intervals between oil changes and tune-ups are extended. Pipes and mufflers last longer because CNG does not react to the metals. All of this reduces maintenance costs while extending the overall life of the engine.
Performance Advantages –
CNG is superior to petroleum-based products because natural gas has an octane rating of about 127. CNG vehicles experience less knocking, no vapor locking, and since natural gas is already in a gaseous state, CNG vehicles have superior starting even under severe cold or hot weather conditions.
About Compressed Natural Gas (CNG)
CNG is a fossil fuel substitute for other auto fuels such as petrol, diesel, Auto LPG etc. For use in Automobiles as fuel, Natural Gas is compressed & dispensed to vehicles at a high pressure of 200 bar to enhance the vehicle’s onboard storage capacity.
Maharashtra Natural Gas Limited (MNGL) started supply of CNG to Pune in 2008, for the Green Commonwealth Youth Games hosted by the city. Since then, MNGL has been supplying CNG to more than 70,000 CNG vehicles – which are growing in number by the day. Through its network of CNG Stations, MNGL is servicing almost all the three-wheelers registered in Pune and Pimpri-Chinchwad and more than 1000 buses of the municipal transport undertaking – Pune Mahanagar Parivahan Mahamandal Limited (PMPML). Besides these – passenger cars, postal vans, school buses, courier vans and other Light Commercial Vehicles (LCVs) are also utilizing CNG.
CNG is quite economical and eco-friendly than the conventional liquid auto fuels. Moreover, it is now easily available in Pune and Pimpri-Chinchwad through the ever-growing network of CNG Stations.
Economical
Availability
In Maharashtra, CNG is at present available in and around Mumbai – thus making plying between Pune and Mumbai easier on CNG. Connectivity with other cities having CNG beyond Mumbai – like Surat and Ahmedabad, ensures continuous driving on CNG to these cities from Pune. Also, dual fuel option is available in passenger cars/taxis that helps in switching between CNG and petrol as and when required.
Eco Friendly
Safety
CNG Cylinder Testing
We provide effective CNG Cylinder Testing Services, which are performed by our well experienced professionals, who are well versed in their respective field. The setup consists of several machines such as Compressors, Water filling stands, Oil Remover Stands, Weighing Stand, Painting Zone, and Internal and External cleaning & examination zone etc.
Procedure
Internal cleaning of cylinders. Cylinder Wall Thickness measurement by Ultrasonic Thickness Tester. Water Jacket and Direct Expansion method for Hydrostatic stretch testing. Cylinder Drying, External Cleaning and Painting. Test mark sign is used after testing the fitness of the cylinder. De-pressuring & Degassing of Cylinders Checking of Tare Weight External Inspection (thickness, bulge, burn, dents, dig). Internal Inspection, Hydrostatic Test, Fixing of Valves, Assemble & Disassemble of CNG Cascades, Deliver the cylinder with Certificate.
MAIN FEATURES OF OUR CNG CYLINDER TESTING SERVICE
The prime aim of the skilled promoters of the company is to discover new possibilities of promoting the utilization of Natural Resources as well as other alternate energy sources to the fullest extent to let the common man avail varied benefits of these resources as they are highly economical as well as pollution free.
Sohum Auto Gas a ISO certified company headquartered in Pune, offers a range of products like the automatic ignition glass gas stoves, gas safety devices and other kitchen and home applliances.
